Replacing 1.5 with 1.8 - anything else to change
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However, although I know those engines will drop in without any modifications, is there anything else I would need to change? If the engine comes with the correct manifolds, etc, will the current exhaust system match up to it? What if I didn't replace the gearbox, but put this engine onto the gearbox I have already? Would those gear ratios be totally inappropriate for the new engine? Anything else that I would need to consider before embarking on this?
Chris
Posted
MOTY 2013
at the basic level yes you can swap the lump over and all the old bits fit, the exhaust manifold will bolt right on. the inlet may or may not? basically the 1.8 will have the 2e2 carb with a coolant channel from the head into the inlet, I have a feeling the 1.5 will not have this so you'll have to go with the 1.8 carb. this will mean a bit of wiring as the 2e2 has a few extra bits, nothing too difficult though. if it has a weber on it though you're laughing just needs an ignition live to the heater on the front (if fitted!) and you're away.
swap the old gearbox over, I would put a new 210mm 1.8 8v carb/gti clutch on and keep the 1.8 flywheel though. the old box is probably similar ratio wise to the 1.8 one anyway
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Richy_Rich said
Kepping my eye on this!
As i was discussing this option with a few mates earlier.
So, all you would need is lump, with manifold, both inlet and exhaust, new carb, and a different gearbox, starter motor, alternator etc.
Would mounts need changing?
Hi,
starter motor, alternator and engine mounts will be the same on 1500 and 1800, I think.
Robin
VW Golf 1500D 5-door 1978 - was daily (wet)
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Mercedes W108 280s 1970 - dusty and forgotten
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VW Golf 1800 cabriolet 1980 - daily (dry)
Bedford CF Trailblazer 1978 - camper
Bedford CF 350 Flatbed 1976 - fun/work
Mercedes W108 280s 1970 - dusty and forgotten
Mercedes S123 200T 1983 - to be renovated
Mercedes C124 1989 - Winter Beater
BMW E21 1976/82 - dusty but not forgotten
Twingo 2004 (not my fault, somebody gave it to me!)
Posted
MOTY 2013
if it was me i would fit full gti exhaust and use the proper 6 bolt flange manifold and downpipe that really peps up the carby lump
Hello my name is John and I'm a dub addict.
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My wiring diagrams and other documents have moved here:
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Posted
MOTY 2013
carb heads have a coolant channel for the inlet which is required for the 2e2 carb, so bear that in mind when fitting a gti head. on some heads you can drill the coolant channel, or you could fit a weber carb which doesn't require the coolant channel
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